No, I'm terrible at drawing(I want to draw, but I lack the motivation to learn and I'm afraid if I keep holding it off, then my drawing hand might get chopped off at work and I'll never make my dream to do a graphic novel series come true(Sorry, wall of text)). *grabs your leg* TEACH ME EVERYTHING YOU KNOW!!! )':

If you have the GIF file, right-click it > open with > and try all the programs that are compatible. One of them is bound to have an image reducing function. If you're desperate, you can download the 30 day photoshop free trial.